Latest version is unfortunately broken:
Failed to call hook 'OnServerInitialized' on plugin 'HumanNPC v0.6.3' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.HumanNPC.OnServerInitialized () [0x0010f] in <4ed0ffa374ba4c1ba4f7c376ca7739de>:0
at Oxide.Plugins.HumanNPC.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00b86] in <4ed0ffa374ba4c1ba4f7c376ca7739de>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d59b507fd76240e5b62228d0eae39b73>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d59b507fd76240e5b62228d0eae39b73>:0